Development of hybrid Ultracapacitor and Lithium-Ion Battery Energy Storage System

This study describes the development and application of a fully active hybrid energy storage system using an Ultracapacitor (UC) bank in conjunction with a Lithium-Ion battery. With the increase of load demand in transport vehicles, Lead-Acid batteries (LABs) experience performance failure due to deep discharges and as a result its lifespan is reduced. The energy management strategy that has been implemented enhance the performance of internal combustion engine (ICE) vehicle battery energy storage systems by extending their lifespan. This improvement is accomplished through the use of a fully active topology that incorporates a power electronic bi-directional DC/DC converter to regulate power flow between energy sources. Fuzzy logic controls the voltage and current of the DC/DC converters within the topology and the state of charge (SoC) of the hybrid energy storage system (HESS), thereby boosting the system's longevity. The results shows that the LIBs' lifespans is increased by 3.41 years. This improvement is made without changing the chemical composition of lithiumion. The report emphasizes how using HESS technology will benefit the automotive industries, including a minimum three-year increase in battery lifespan.